ASP.NET MVC - Getting Html.BeginForm() to remember Querystring params when submitting via GET

Question

I have a form rendered via Html.BeginForm(), it exists as a component in the Master page so that it appears on every page in the application. I have done this using Html.Ren

Answer 1

A direct to call BeginForm() does keep your query string values. Any other overload tends to fail. I love the ease of using BeginForm() from my forms, but needed a way to class all my styled forms a certain way an not lose the query string values in the action.

Here is what I came up with:

public static MvcForm BeginNormalForm(this HtmlHelper htmlHelper)
{
    var dictionary = new Dictionary {{"class", "normal"}};
    var rvd = new RouteValueDictionary();
    if (htmlHelper.ViewContext.HttpContext != null && htmlHelper.ViewContext.HttpContext.Request != null)
    {
        foreach (var key in htmlHelper.ViewContext.HttpContext.Request.QueryString.AllKeys)
        {
            rvd[key] = htmlHelper.ViewContext.HttpContext.Request.QueryString[key];
        }
    }
    var form = htmlHelper.BeginForm(null, null, rvd, FormMethod.Post, dictionary);
    return form;
}

Seems to work well and keeps my class attribute.